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Full text of "The manufacture and properties of iron and steel"

246
METALLUHGY OF IRON" AND STEEL.
TABLE XIII-G.—Continued.
All Ji inch. | Thick, of plate, in^t. | 2d ingot. | 1st ingot, j				Elongation in 8 in.; percent.	Bednction of area; per ct.	Chemical composition; per cent.			
	Part of ingot from which slab was cut	Ult. strength pounds per square inch	Elastic limit; pounds per square inch						
						0.	P. .	Mn.	8.
	Top, Bottom, Average,	49880 40150 48190 48190	29740 29680 80030 80270	81.75 83.00 83.00 80.25	58.5 63.5 67.1 60.8	.11 .10 .11 .11	.017 .017 .016 .016	.82 .85 .26 -.85	.040 .041 .088 .048
		48858	29930	82.00	60.0	.11	.017	-.82	.030
	Top, Bottom, Average,	50480 40030 47740 48310	28570 '81880 29930 80430	80.75 83.76 83.25 83.00	61.0 62.6 63.9 64.7	.13 .12 .10 .11	.019 .018 .017 .019	J3 .83 .38 .81	.048 .088 .085 .006
		48890	80203	82.69	63.1	.12	.018	.88	.038
	Top, Bottom, Average,	40630 48910	80410 80510	80.00 80.50	64.0 68.0	.11 .10	.017 .017	.86 ,85	.024 .088
		49270	80460	80.25	63.5	.10	.017	.86	.020
*i '*!	Top, Bottom, Average,	48440 47000 47260	80460 80530 29850	82.00 84.00 81.25	,65.9 67.2 68.0	.10 .11 .13	.019 .017 ,016	.82 .85 .85,	.086 .066 .084
		47767	30280	32.42	60.4	.11	.017	.34	.085
43 •     •» O n M ^^ 43 a a . ** £  >d 1	Top, Bottom, Average,	50660 50860 63860	82710 80480 88710	85.00 83.25 29,25	64.7 63.8 68.6	.18 .13 .11	.017 .021 .025	.45 .44 .46	.022 .028 .067
		61793	82300	82.50	62.4	.12	.021	.45	.029
	Top, Bottom, Average*	"5^)80	83970 84100 82140 82840 817fiO	80.00 81.26 83.00 83.25 81.75	59.4 63.9 61.0 64.2 65.2	.15 .15 .12 .14 .13	.024 .022 .018 .020 .013	.46 .46 .44 .44 .43	.OBI ,020 .026 .023 .023
		61802	82962.	81.85	62.7	.14	.019	.45	.026
AHA 3d ingot.	Top, Bottom, Average,	63140 sioao 50060 49260	82440 88400 42650 81460	82.50 82.75 81.25 81.00	60.7 65.1 61.9 65.0	.11 .13 .14 .15	.024 .019 .021 .020	.42 .42 .42 .41	.080 .020 .02T . .026
		51245	82488	81.88	63.2	.13	.021	.42	.028
4th ingot.	Top, Bottom, Average,	52880 50690	82460 84450 83450 82090	81.75 80.00 29.50 83.75	64.2 69.4 62.8 61.4	.15 .17 .14 .10	.028 .026 .024 .018	.44 .44 .45 .42	.080 .023 .080 .029
		52528	83118	81.25	62.0	.14	.024	.44	.080
they were made by the color method. The work was performed by men who are regularly engaged in doing nothing else, and without any attempt at extra care, but in order to see whether there really were any such differences in composition as the records would indicate, the samples showing the widest variations in three heats were reworked twice by color and once by combustion; the results